Hand warmer



FIG. 1 is a front view of a hand warmer showing my design;

FIG. 2 is a back view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a front left perspective view thereof; and,

FIG. 8 is a front right perspective view thereof.

The broken lines shown in the drawings depict portions of the hand warmer in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for a hand warmer, as shown and described. 